Improvement in spoke-tenoning machines



R. w. EATON. Spoke-Tenoning Machine.

Patented Feb. 26, 1878..

Witnesses Inventor UNITED S TATEs PATEN'I'WQEFICE.

ROBERT w. EATON, or wATsoNvIL'LE, CALIFORNIA.

IMPR'OV E MENT' IN SPOKE-TENONING MACHINES.

Specification forming part of Letters Patent No. 200, 649, datedFebruary 26, 1878; application filed January 14, 1878.

To all whom it may concern:

Be it known that I, ROBERT W. EATON, of Watsonville, county of SantaCruz, and State of California, have invented an Improved SpokeTenonAuger; and I do hereby declare the following to be a full, clear, andexact description thereof, reference being had to the accompanyingdrawings.

My invention has reference to a novel arrangement of a tenon-auger forboring tenons on the ends of spokes.

Referring to the accompanying drawings, Figure 1 is a perspective Viewof my device. Fig. 2 is a sectional view of the same.

A represents a bar, having a portion, B, at one end bent at rightangles, and provided with means for securing it upon the end of thespoke to be tenoned.

The means which I have represented consists in making the end of thisbent portion B larger than the spoke, and then making a hole, 0, throughit longitudinal with the bar A, which hole is considerably larger thanthe end of the largest-sized spoke. The upper part of the hole I makeangular, in the form of an inverted V, and in the lower part of the holeI place a block, D, the upper part of which is grooved out to form aV-shaped channel.

' The block Dis attached to a screw, E, which passes through the end ofthe part B, so that it can be adjusted up or down by turning the Inattaching the device to a spoke, I lower the block D and slip the end ofthe spoke in between the upper portion of the hole 0 and the block D, soas to leave a sufficient length projecting inside of the hole to formthe tenon on. I then set the block up against the under side of thespoke, so as to clamp it between the two angular grooves. The bar A willthen project out beyond the end of the spoke.

raised or lowered by turning the screws without changing their positionotherwise.

The band of the auger passes through the rings H H, and as these ringscan be raised or lowered by means of the screws G G, the band can bereadily lined with the end of the spoke.

The tenon-auger is secured to the inner end of the band, and a crank, K,is attached to its opposite or outer end, so that by turning the crankand advancing the band the tenon will be bored.

The band I make in two parts, L M, which are screwed together at aboutone-third its length from the cutter-head or auger, so that thecutter-head can be removed, if desired, andused on an ordinaryhand-brace. Through the longer part M of the barrel I pass a rod, 0,into the outer endof which a rod, P, is screwed, and on the outer end ofthe rod is a button, Q. By grasping the button the pipe can be pulledback or forth, as desired, and adjusted, as desired, to regulate thelength of the tenon.

The cutter head consists of two sliding heads, It R, mounted in a frame,S, and moved by means of screws K K. One of these heads has a V-shapednotch, T, and the other a V- shaped projection, U, which it each otherwhen the blocks or heads are closed together.

The knife Vis secured on the face of the head I R, which has theV-shaped projection, and is held in place by a set-screw, W.

The point of the V projection of the block R is cut off and madeconcave, so as to form three points of bearing for the tenon when it iscut, the sides of the V-notch forming two, while the concave point formsthe third.

The heads R B have each a ridge or flange on its outside, which fits ingrooves in the sidesv of the frame. These blocks can be set at anyrequired distance from each other, according to the size of the tenondesired.

The bit or-cutter need only be taken out when it requires sharpening.

After the implement has been secured to a spoke, as represented at Fig.2, theheads R It are set to the required distance apart, and

the band turned until the end of the tenon strikes the end of the rod1?, thus forming a bined and arranged to operate substantially tenon ofthe required length. a as shown, and for the purpose described.

Having thus described my invention, what In witness whereof I hereuntoset my hand I claim, and desire to secure by Letters Patand seal. I cut,is-

The cutter-head consisting of the block R ROBERT WILLIAM EATON R,adjustable in the frame S, and having the' Witnesses: interlockingV-shaped groove T and V-shaped L. D. HOLBROOK, projection U, with itsconcave edge, all com- CLINTON G. DODGE.

